Validating data datagrid
In this example I am implementing an generic validation rule that takes a regular expression as validation rule.
If the expression matches the data is treated as valid.
Cheers Mark Tim Coffee, A request has been made in Community Support to close this question: there are no objections, after 72 hrs, a moderator will finalize this question by: - Saving this Q as a PAQ and refunding the points Please leave any recommendations here.
Best regards, Yensid Mod Community Support Moderator @Experts Exchange I am happy to close the Q, apologies to mvsmith07 that I may not have responded all the time as notifications seem a little out of sync at the moment.
To validate data to grid cells and rows, we need to use the Validate Cell event, which will be raised by the Kettic Data Grid View when there are any changes to the current cell or when the grid cell loses input focus like.
Before we validate data to grid cell, we need to cancel the Validate Cell event to prevent the users from exiting the cell until entering a valid editor value or cancelling the edit process.
As well as not being able to do asynchronous validation using IData Error Info, another potential drawback are multiple errors for a single property are combined into a single error message.This slows down your application and causes the following message in your debug window: System. Data Error: 16 : Cannot get ‘Item‘ value (type ‘Validation Error’) from ‘(Validation. when you're new to WPF it's not obvious sometimes what goes where or what references are needed etc. How will you stop user from going to next page till user clears all validations on this page? As soon as user will click submit button, all client side validators will validate and of any of them fails then user remains on the same page. I have a little problem in this validation process. Errors)’ (type ‘Read Only Observable Collection`1′). I don't wan't to show user the validation errors (red border on controls) before they try to save the form. Cancel = True End If End Sub This isn't quite working because of what I am trying to do I think.The event only seems to be called on the column you make a change to and you have to make a change to the column in order for the event to be called.